Bug#1132617: mesa: update debian trixie-backports to 26.0.x

On 5/17/26 09:57, Rene Engelhard wrote:
> apache-arrow there, and backporting that one is nozt possible 
> without backporting cython3 and whatever else...

jftr, I did that for backporting harlequin and the only parts that are 
needed are apache-arrow (with apache-arrow-testing and 
apache-parquet-testing) and cython3, nothing more:

https://packages.fastforward.debian.net/#apache-arrow

> And if a new mesa, as implied, breaks stuff and needs a big transition, 
jftr, it doesn't (I'm using backported mesa 26.1 since ~2 weeks now on 
multiple systems).

Regards,
Daniel